There is an User manual casio aw-591ml-1a support site. Here is the List of Casio GShock Series Watches, GShock is a brand of watches manufactured by Casio, known for its resistance to These two new models represent some of the very best of the tough and durable GSHOCK design in basic GSHOCK black. Both the band and case are black, and metal parts are also black ion plated. Innovative products bring joy, create new lifestyle and pave the way for related economies especially, if they have been developed by CASIO.